Hi all, I have also tried using those cheap, black plastic tubes from Home Depot--They're the ones used for draining water away from a house. I've had very good luck with those ones--my little guys *love* them, and you can buy elbows and tees and make a giant maze with the help of a good knife. Plus, you can change it around every once in a while--that one's funny, because when Chopper went through for the first time after I did that, he shot out and started dooking and war dancing like crazy! I think he liked it. Best part is, I think I only spent $15 on the whole thing--something like $3 for 10 feet of tubing and then $1.50 each for elbows and tees. Dooks to all, Chris, slave of weasel [Posted in FML issue 2968]